Fluke Networks PTNX8-CABLE Pocket Toner NX8 Coax Cable Tester Kit Test VDV cables for continuity, AC and DC voltage, opens, shorts, 50-75 Ohm termination, and polarity/dial tone. Interchangeable adapters to connect to any voice, data or video cables Eight ID caps for testing eight cables at once Auto shut-off and low-voltage circuit protection Audible and visual indicators